How is the center of a monocot root different from a eudicot root.

Explanation:

Monocot stems have most of their vascular bundles near the outside edge of the stem. The bundles are surrounded by large parenchyma in the cortex region. ... Monocot roots, interestingly, have their vascular bundles arranged in a ring. Dicot roots have their xylem in the center of the root and phloem outside the xylem.

b is the best answer for this question.

the answer is golgi apparatus